How do the molecules of cold water differ from the molecules of hot water?

2. A pebble is dropped down a well and hits the water 1.5 s later. Using the equations for motion with constant acceleration, determine the distance from the edge of the well to the water's surface.

We know for newton's 2nd law of motion that the force on an object is equal to the mass of the object times the acceleration of that object. a 9kg bowling ball was thrown with a force of 5 n.

A light ray strikes a plane mirror at an angle of 20 degrees to the normal. What is the angle of the reflected light ray to the normal? 40 degrees 70 degrees 0 degrees 20 degrees

Galileo estimated the height of lunar mountains by: (A) measuring the height of clouds around the mountains (B) measuring the wavelength of light rays in his telescope (C) looking it up on the internet (D) observing illuminated mountain peaks in the

A metallic sphere has a charge of + 3.1 nC. A negatively charged rod has a charge of - 4.0 nC. When the rod touches the sphere, 9.2*109 electrons are transferred. What are the charges of the sphere and the rod now?

How does an atom of chlorine-37 become a chloride ion with a - 1 charge? 17 35.45 O A. The atom gains 1 electron, to make a total of 21. O B. The atom gains 1 electron, to make a total of 18. O C. The atom loses 1 proton, to make a total of 36. O D.

What is the momentum of a 500-kg car moving at 10 m/s?

Which statement describes the formation of a nebula? A. An elliptical flattened disk begins. B. A bulging core with irregular stars around it forms. C. A large flattened core at the center contracts. D. Gases from a dead star gather and contract.

What are 4 things that can happen to a light wave when it hits an object?

Which of the following is NOT a strategy to prevent falls? a. keeping walking surfaces free from moisture and clutter b. replacing damaged electrical cords c. installing handrails for stairs d. keeping a ladder handy for reaching high places